vagus

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vagus

The vagus nerve helps regulate the heartbeat.

Definition

Noun A major cranial nerve (the tenth cranial nerve) that is a long, complex, mixed nerve (containing both sensory and motor fibers). It extends from the brainstem down through the neck and into the chest and abdomen, providing parasympathetic innervation to and receiving sensory information from numerous vital organs, including the heart, lungs, esophagus, stomach, and most of the abdominal viscera. It is a key component of the parasympathetic nervous system, often referred to as the "wandering nerve" due to its extensive pathway.

Usage Examples
  • Noun:
    • Stimulation of the vagus nerve can help regulate heart rate.
    • The vagus plays a crucial role in the digestive process by controlling stomach acid secretion.
    • Doctors studied the effect of vagus nerve activity on inflammatory responses.
Advanced Usage
  • "Vagus nerve stimulation (VNS)": A medical treatment involving the use of a device to send electrical impulses to the vagus nerve, often used to treat epilepsy or depression.
    • Vagus nerve stimulation is an approved therapy for drug-resistant epilepsy.
Variants and Related Words
  • Vagal (adj): Pertaining to the vagus nerve.
    • The patient exhibited a strong vagal response, causing a drop in heart rate.
  • Vagotomy (n): A surgical procedure involving the cutting of parts of the vagus nerve, historically used to treat peptic ulcers.
Synonyms
  • Pneumogastric nerve: An older anatomical term for the vagus nerve, referencing its connections to the lungs and stomach.
  • Cranial nerve X: The numerical designation for the vagus nerve within the set of twelve cranial nerves.
  • Wandering nerve: A descriptive synonym highlighting its long, meandering course through the body.
Related Phrases and Idioms

Note: As a specific anatomical term, the word "vagus" itself does not commonly form phrasal verbs or idioms in everyday language. Its usage is primarily scientific and medical.

vagus

The vagus nerve helps regulate the heartbeat.

Noun
  1. a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera

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